Check for strongCount of Surface to avoid double delete in ~Surface()

After binder transaction, keep a check for strongCount of Surface to
avoid creating a sp<Surface> with a surface which is being destroyed
because it will lead to double delete in ~Surface() when it goes out
of scope.

(cherry picked from commit 3f69147188d0ba2607dab084fc04117f5d02d5c7)

Change-Id: I4f67670ac81752113a48200a85ccef4737f25ce7